Tack-driving machine



IWITHESE, ES.

(No Model.)

E. WOODWARD.

- TACK DRIVING MACHINE. I 7 No. 365,497, Patented June 28, 1887.

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Fig. 1.

UNITED (STATES PATENT ()rrrcn.

ERASTUS WOODW'ARD, OF SOMERVILLE, MASSACHUSETTS, ASSIGNOR TO THECOPELAND IMPROVED PORTLAND, MAINE.

LAST-ING AND TAOKING COMPANY, OF

TACK-DRIVING, MACHINE.

SPECIFICATION f'u'ming part of Letters Patent No. 365,497, dated June28, 1887.

Application filed March 18, E87. Serial No. 231,334. (No model.)

To all whom it may concern.-

Be it known that I, ERASTUS WooDwARD,

construction and organization, all of which will be hereinafterdescribed. t

In the drawings, Figure 1 is a view in side elevation of my tackingmachine or tool. Fig. 2 is a Vertical central section thereof. Fig.- 3is a view inelevation of the driver-rod. Fig. 4 is a horizontal sectionupon the line as m of Fig. 5 is a view in horizontal section upon theline 3 y of Fig. 1, and in plan of the parts below said line. Fig. 6 isa view in rear elevation, enlarged, of the lower part of the tacker.Fig. 7 is a section of the driverrod to show the shape of the camsthereon.

Fig. 8 is a view representing the position of the feed'p'awl at the endof its outward movement just before it is moved inward to engage theshank of a tack.

A is the stock or case. a is the foot or section to which the nozzle ais secured. The foot or section a and the stock A are preferably made ofone casting, and the section of the stock between the ribs a a isadapted in using to be held or grasped by one hand.

B is the driver-bar, and b the driver-rod, which is secured to the lowerend of the driverbar.

b is the passage or throat in which the driver-rod b is reciprocated.The driver-bar B extends into the hole I) in the stock, and is supportedby the stock, and its end 1) extends above the stock and has the head orbutton I). It is adapted to be moved downward against the stress of thelifting-spring b a portion of which is held in the recess or chamber 12in thehead of the stock.

0 is the horizontal feed way or passage, by

which the tack-strip c is fed to the driver.

0- is an extension of said passage, through which the tack-supportingstrip is moved as the tacks are removed therefrom by the driver I). i

The tack-strip feedingdevices comprise a feed-pawl, D, which has theteeth (I d, of which the tooth d is adapted in feeding the strip toengage the shank of the first tack in order in the strip, and the toothd the shank of the second tack in order. The pawl D is carried orsupported by the lever or arm d,

which projects from the lower end of the shaft d which is inclosed inthe case or stock A, and-the pawl is secured to the lever ,by the washerd, screw d which passes through a hole in the pawl, and'spriug d, whichbears against the washer and forces the pawl against the under surfaceof the arm or lever d so that it is held thereto by friction, a leatherwasher, al being inserted between the upper surface of the pawl-bar andthe under surface of the lever or arm (P, and another I provided withv astraight horizontal movement parallel with a tack-strip feedway as it ismoved backward to engage the shanks of the tack-strip, as willhereinafter appear. The tack-strip is fed by the feed-pawl upon themovement of the driver-bar, and the pawl is moved'fromthe throat-of themachine, or the position in which it is represented in Fig. 5, outwardfrom the throat and backward during the downward movement of the driver.These movements are communicated to the pawl through the shaft d rbymeans of cams upon the driver-bar B, which are oppositely arranged toeach other. The 'cam E, cut in the side of the driver-bar B, andconnected with the shaft d by the arm 6, controls the shaft and thelever or arm (1 during the downward movement of the head B, so that theteeth I) of the pawl are moved out of the passage b, and the pawl itselfmoved backward to bring the teeth (2 d into position to engage theshanks of the next tack in order. Of course the pawl D is turned by thearm or lever (1 until the projection (2 upon the arm d comes in contactwith the plate d, and from that time on and during the continuedmovement of the lever 11 the pawl is moved horizontally on astraightline parallel with the tack-strip feedway. Upon the upward movement ofthe driverbar B, the cam E, (see Fig. 2,) which is a straight patterncut in the side of the driverbar B, which is connected with the shaft (1by the arm 0', (see Fig. 4,) turns the shaft d in 'an opposite directionfrom the cam E, and

this throws the teeth of the pawl into engagement with the shanks of thefirst two tacks of the tack strips, the pawl being moved inward upon anarc of a circle until a projection, (1 at the front end of the pawl Dcomes in contact with the surface d, which stops the farther inwardmovement of the pawl, and by the continued forward movement of the arm dthe pawl is moved forward still in engagement with the shanks of thetack-strips, and having a straight forward movement, the pawl turningupon the pivot or screw-stud d as it is moved.

There is used for holding the first tack in order in the throat of themachine after it has been fed the hinged block F, having the tooth f,(see Fig. 5,) which shuts into the feedway at the point where it entersthe throat, and which has an inclined surface toward the feedway and astraight surface toward the throat. This block is pivoted atf, and isheld in position by the springf.

In feeding the tack-st! ip the shank of a tack coming in contact withthe inclined surface of the tube forces it outward until the shank ofthe tack has been moved into the throat,whe n the spring turns the blockto its original position and the tube thereon serves to close thepassage to the throat of the machine.

I am aware that tack-driving machines or tubes have been made whichembrace some of the features herein described, and my invention relatesespecially to the manner of operating the feed-pawl by means of arock-shaft having movements imparted to it by the cam upon thedriver-bar.

Having thus fully described my invention, I claim and desire to secureby Letters Patent of the United States- 1. In a tacking machine orimplement, the combination herein described of a feed-pawl for feedingthe tack-strip, a rock-shaft, and a driver-bar provided withcam-surfaces for operating the rockshaft and pawl, substantially as setforth, l

2. In a tacking-machine, the combination of the driver-bar B, havingcam-surfaces E E, feed-pawl D, rock-shaft d", and segmental arms 6 a,substantially as set forth.

3. In a tacking-machine, the feed-pawl carried by a lever-arm andoperated by a rock shaft, the pawl being secured to thelever-arm by theset-screw d, and interposed spring and washers, substantially as setforth.

4. In a tacking-machine, the hinged block F, having the tooth f, whichis adapted to shut into the feedway at the point where it enters thethroat of the machine, and which has an inclined surface toward thefeedway and a straight surface toward the throat, substantially asdescribed.

ERASTUS VVOODWARD.

\Vitnesses:

THos. WM. CLARKE, FRED. B. DOLAN.

